Double cone rotary vacuum dryer system consists of the host, a condenser, a buffer tank, a vacuum pumping system, heating system and control system etc.. With respect to the host, a rotary cylinder, vacuum pumping pipeline, left and right rotary shaft, gear and rack.
In the rotary simplified closed clamping sleeve thermal energy (such as hot water, low pressure steam or thermal oil), the inner wall of the barrel body heat to dry materials. At the same time, under the driving of the dynamic force, rotary cylinder is rotated slowly, mixed material in the tube constantly, so as to strengthen the purpose of drying. When working, the material in the vacuum state, through the steam pressure decline in the role of the material surface water (or solvent) saturated and evaporation, and the vacuum pump to discharge recovery. In the process of drying, the material inside the water (or solvent) continuously to the surface infiltration, evaporation and discharge, the 3 processes are continuous, the material can achieve the purpose of drying in a very short period of time.
Double cone rotary vacuum dryer common problems in application
The noise is too large and the inlet and outlet leakage
(1) due to the double cone rotary vacuum dryer foot loose, worm gear reducer, bearing damage, damage to the application of AC bad chain too loose or too tight caused by excessive noise, just regular inspection, timely troubleshooting.
(2) in normal, outlet leakage is due to the sealing strip damaged, as long as the replaced.
The load exceeds the theoretical amount
Because the bulk density, loading and material double cone rotary vacuum dryer (of a unit volume of material quality), under normal circumstances, design the proportion of materials by 0.6 Bei / cm3 to calculate. If more than the proportion, in the actual production is to charge according to the existing theory, one will affect the efficiency of drying materials; two is the long time operation leads to the decrease of motor, reducer and sprocket chain, life, until can't use. In addition, some manufacturers in pursuit of production and workers operate blindly, regardless of its filling rate (the actual loading volume and dry simplified volume ratio), leading to quality problems of equipment operation and product double cone rotary vacuum dryer continuously. It is worth mentioning is: double cone rotary vacuum dryer filling rate is usually 30% ~ 50%.
"Empty" phenomenon
If used improperly, double cone rotary vacuum dryer will appear as curved, sealing sleeve damage, deformation and fracture of the filter head phenomena such as vacuum tubes in the drying process, this is because in the outside air in the drying process (referred to as venting) into the recoil filter head, when the body has reached a higher degree of vacuum, will the powerful impact of positive and negative flow caused by damage to the vacuum system. Note: in the material drying after emptying to vent tank, must the flow control by emptying valve, the valve is opened to a tank, the vacuum decreased gradually and then slowly increase.
The vacuum degree is not up to or over
Double cone rotary vacuum dryer will often appear vacuum is not enough or too high in the drying process, which is usually 3 reasons: (1) the vacuum end mechanical seal leakage; (2) the vacuum pipeline leakage or blockage; (3) filter is blocked. This needs to be examined in the use process, at the same time to maintenance, cleaning etc.. It is worth mentioning are: manufacturing plant should be maintenance terms according to different models of the main parts in the preparation of instructions for use, as far as possible the detailed. Such as filters, how much time need cleaning, replacement or under what circumstances change, usually use the attention points etc.. |
